docs: move to fumadocs 14 (#338)

docs/app/source.ts

@@ -1,9 +1,13 @@
-import { map } from "@/.map";
+import { docs, meta, changelog as _changelog } from "@/.source";
 import { createMDXSource } from "fumadocs-mdx";
 import { loader } from "fumadocs-core/source";
 
-export const { getPage, getPages, pageTree } = loader({
+export const source = loader({
 	baseUrl: "/docs",
-	rootDir: "docs",
-	source: createMDXSource(map),
+	source: createMDXSource(docs, meta),
+});
+
+export const changelog = loader({
+	baseUrl: "/changelog",
+	source: createMDXSource(_changelog, meta),
 });